Device for tempering glass.



"M; Wfmvrsome, KESTER & J. M. ROWAN. DEVICE FOR TEMPERING GLASS.

APPLICATION FILED APR. 5, 1911.

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MATTHEW W. DAVISON, GEORGE KESTER, AND JAMES M. ROWAN, OF DU BOIS,

' PENNSYLVANIA.

DEVICE FOR TEMPERING GLASS.

Specification of Letters Patent.

Patented Aug. 15, 1911.

Application filed April 8, 1911. Serial No. 619,836.

Be it known that we, Mn'r'rnnw \V. DAVI- son, Gnoucn Kns'rnn, and Janus M. ROWAN, citizens of the United States, residing at Duloois, in the county of Clearfield and State of Pennsylvania, have invented certain new and useful Improvements in Devices for Tempering Glass, of which the following is a specification, reference being had to the accompanying drawings.-

Our invention relates to certain new and useful improvements in the manufacturing of glass and more particularly to a tempering device used in the manufacture of machine-mmleglass, and our object is to provide a device that will temper glass as it is being drawn and blown, so as to be of a quality, when finished, equal to glass made by hand. .7

A further object of the invention resides in providing a tubular casing of trusto-couical design lined with asbestos and capable of vertical movement.

A still further object of the invention resides in providing the tubular casing with circular burners within the same and also providing the same with a door.

A still further object resides in providing a device which is simple in construction, inexpensive to manufacture and extremely fcctive in operation.

Vith these and other objects in view, our invention consists in the novel features of construction, combination and arrangement of parts as will be hereinafter referred to and more particularly pointed out in the specification and claims. 4

In the accompanying drawing forming a part of thisapplication, Figure 1 is a side elevation of the device applied to use, and, Fig. 2 is a verti fal section through the casin In carrying out our invention, we shall refer to the drawing in which similar refercnce characters designate correspomling parts'throughout the several views and in which- 1 indicates a receptacle for containing glass in liquidor semi-liquid state, which receptacle is adapted to be inserted in an opening in the ground or floor 2, and extending vertically upward from said floor or ground 2 on opposite sides of said rece tacle, are the standards or guide rods 3 an 4. Extendiug transversely of the guide rods 3 and 4 is a bar 5, the outer ends of which have se cured thereto, the ring members 6 and 7 which are slidably engaged, respectively, I

with said rods 3 and 4:, and extending through said bar'about centrally thereof, is a blow pipe 7. Said blow pipe is held to the bar in any desired manner, so that when said bar is raised or lowered, said pipe will likewise 'beraised or lowered therewith, and the lower end of said pipe is provided with the usual or any preferred form of gatherelf 8 having the air exit opening 9 therein, and it will be seen that as said gatherer is dipped within the receptacle 1 containing the liquid glass, and said gathercr drawn upwardly, said liquid glass will be drawn therewith and the blowing of the air through the pipe 7 and opening 9 will blow the glass into the usual rolled form.

It is a well. known factthat the quality of mach inc-made glass is far below that of handmade glass, this being true mainly because machine glass is more brittle and more easily broken, but this defect is dueto the lack of an effective tempering device. Numerous attempts have been made toward the improvement of the conditions in tempering machine-n'iade glass, but all have failed practically, and to this extent, we provide an improved 'means wvhich comprises a tubular casing 10 of trusto-conical design, said casing being provided adjacent its upper and lower ends with the laterally extending straps or hangers 11, said straps having' casing, it will be understood that one or more than two may be provided, as desired, without departing from the spirit of the invention. Said burners are supplied with gas from a main pipe 17 through the medium of a valve 18, and said burners are provided with a plurality of jets 19, so closely disposed as to'form a continuous flame throughout the circular burners when the gas flowing therefrom is ignited. Asbefore stated, the clamping members 12 retaining said casing in position, are slidably I the casing and may be retained in its closed or locked position by means of a latch 23,

and when it is desired to move the roll of glass from the blow pipe, said door may be opened and the roll passed therethrough Without interferring with said casing.

The-casing being of frusto-conical design, will naturally have the lower end thereof of larger diameter than the diameter of the receptacle 1, and the tubular circular burners being mounted within said casing in the lower end thereof, will doubtless be of greater diameter than said receptacle, so that as the gatherer is drawn upwardly from the receptacle, the glass drawn therewith will be passed through the burners, as usual. The casing being designed frusto-conical, however, lined with asbestos, will retain considerable heat therewithin so that the roll of glass will be heated throughout the length-of said casing, which will properly temper said glass.

It is, of course, essential to have. the heat greatest at the lower end of said casing and in numerous devices heretofore used for the tempering of machine-made glass, there has been provided no means for retaining the heat in any device through which the roll of glass is adapted to be passed, so that as soon as the glass passes the zone of greatest heat, it becomes quickly cooled and is, therefore, brought out 'in a brittle state. In our device, however, it will doubtless be seen'that the zones of heat will be graduated,- so that .the greatest heat will be at the lower end,

the design of the casing and the lining thereof with asbestos causing the heat to remain throughout the length thereof and the zone of least heat at the upper end, and in this manner, glass may be turned out in a state of flexibility equal to that ofhandmade glass.

i From the'foregoing, it will be seen that we have provided a simple and economical device for the tempering of machine-made glass which will be extremely effective in operation.

lVhat we claim is 1. In the manufacture of glass, the combination with a receptacle and a gatherer; of a casing disposed above said receptacle through which said gatherer is adapted to be drawn, whereby said casing may be raised and lowered, and means to retainthe same in any adjusted position.

2. In the manufacture of glass, the combination with a receptacle and a gatherer;'

of a tubular casing slidably mounted above .said receptacle through which said'gatherer is adapted to be drawn, said casing being lined with a heat-retaining material, and a burner mounted in the lower portion of said casing.

3. In the manufacture of glass, the combination with a receptacle and a gatherer; of a tubular casing of frustoconical design, said casing being slidably mounted above said receptacle and lined with a heat-retaining material, and a burner mounted in the lower portion of said casing.

a. In the manufacture of glass, the combination with a receptacle and a gatherer;

of a tubular casing of frusto-conical design and having the inner wall thereof lined with a heat-retaining material, guide rods, means to slidably mount said casing on said guide rods, and a burner mounted in the lower portion of said casing.-

5. In the manufacture of glass, the combination with a receptacle and gatherer; of a pair of guide rods, means to slidably mount said gatherer between said guide rods, a tubular casing also slidably mounted between said guide rods, said casing having the inner wall thereof lined with a heat-retaining material, means to limit the downward movement of said casing on said rods,

and a burner mounted in the lower portion of said casing.

6. In the manufacture of glass, the eom bination with a receptacle and a gatherer; of a tubular casing of frustoconical design, said casing being slidably mounted above said receptacle and having the inner wall thereof lined with a heatretaining material, said casing also having a door formed in the wall thereof, and a burner mounted in the lower port-ion of said casing. V

7. In the manufacture of glass, the com-' bination with a receptacle and gatherer; of a pair of vertical guide rods disposed on opposite sides of said receptacle, means to slidably mount said gatherer between said ing being of frusto-conical design and havv 'ing the inner wall thereof lined withe heatrods, a tubular casing alsoslidably mounted our signatures in the presence of two witon said rods, means to limit the downward nesses.

movement of said casing thereon, said cas- MATTHEYV W, DAVISON.

GEORGE KESTER. V

JAMES M; RQVVAN. retaining material, and a burner mounted Witnesses: in the lower portion of-said casing. JOHN BUGGEY,

In testimony whereof we hereunto afiix PAT WALTERS. 

